How To Fix MDG_TR074 - This table key already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_TR - MDG: Transport Tool

• Message number: 074

• Message text: This table key already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_TR074 - This table key already exists ?

  The SAP error message MDG_TR074: "This table key already exists" typically occurs in the context of Master Data Governance (MDG) when there is an attempt to create or update a record in a table where a unique key constraint is violated. This means that the system is trying to insert or update a record with a key that already exists in the database.
  Cause:
  
  Duplicate Key Entry: The most common cause is that the key (e.g., a unique identifier for a master data record) you are trying to insert already exists in the database.
  Data Migration Issues: If you are migrating data from another system or performing bulk uploads, there may be duplicates in the source data.
  Concurrent Processing: If multiple users or processes are trying to create or update the same record simultaneously, it can lead to this error.
  Incorrect Logic in Custom Code: If there is custom logic in user exits or BAdIs that does not properly check for existing records before attempting to create new ones.
  
  Solution:
  
  Check for Existing Records: Before attempting to create a new record, check the database to see if a record with the same key already exists. You can do this by querying the relevant table.
  Data Cleansing: If you are migrating data, ensure that the source data is cleansed to remove duplicates before the migration process.
  Error Handling in Custom Code: If you have custom code, ensure that it includes proper checks for existing records before attempting to insert new ones.
  Locking Mechanisms: If concurrent processing is an issue, consider implementing locking mechanisms to prevent simultaneous attempts to create the same record.
  Review Change Requests: If the error occurs during a change request, review the change request to ensure that it is not trying to create a duplicate entry.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the structure of the relevant tables and their keys.
  MDG Configuration: Review the configuration settings in MDG to ensure that the key fields are correctly defined and that the uniqueness constraints are properly set.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on handling it.
  Debugging: If the issue persists, consider debugging the process to identify where the duplicate key is being generated or attempted to be inserted.
  
  By following these steps, you should be able to identify the cause of the MDG_TR074 error and implement a solution to resolve it.